【单选题】-Hello, may I talk to John please? -( ).
A.
Sorry, he is busy at the moment
【单选题】I ______ that John will come to the party. He's busy preparing for an examination.
【多选题】以下哪些是无人机能够解决的行业痛点?
B.
农业查勘人员需同时具备保险财产损失和土木工程知识
【简答题】线偏振光通过四分之一波片,且光的振动面与四分之一波片的光轴方向成30度的角,则出射光为__________。
【单选题】— Is John coming over this weekend? — He should, but he _______ not. He seems to be busy these days.
【单选题】Mary and John are busy looking for a hotel for their wedding______.
【单选题】采用化学多层涂膜技术制成的干片组成不包括( )
【单选题】John is busy ______ his girlfriend ______ her paper.
【单选题】Mary and John are busy looking for a hotel for their wedding __________
【单选题】一项基金的积累函数为a(t)=0.2t2+1。如果在时刻1投资100元,这笔投资就将在时刻4增长到()元。